The girls made their mark in the 90s, but throwback music and television are SO in right now (Fuller House, anyone?!), and it looks like the British gal pals are about to cash in on the nostalgia phenomenon!

Girls Aloud have kicked off their Ten Tour at the Metro Radio Arena in Newcastle Thursday night, and not only did our beloved singing sensations bring it HARD, but they had a couple of surprises in store for all of the fans who have anxiously been awaiting their return to the stage as a group for what seems like a lifetime!

While she, Nadine Coyle, Nicola Roberts, Sarah Harding and Kimberley Walsh DOMINATED all of our favorite hits that cemented their status as more than just the winners of Popstars: The Rivals, the ladies decided to have some fun with their set-list and through in one hell of an unexpected, yet welcome cover!

"My metabolism actually changed like crazy this year. I have Hashimoto's disease. It's a thyroid disease, and it's now been two years since taking the medication for it, so for the VS show I didn't want to lose any more weight, I just want to have muscles in the right place, and if my butt can get a little perkier, then that's good."